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md5.js
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md5.js
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/*
* JavaScript MD5
* https://github.com/blueimp/JavaScript-MD5
*
* Copyright 2011, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* https://opensource.org/licenses/MIT
*
* Based on
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for more info.
*/
/* global define */
/* eslint-disable strict */
/**
* Add integers, wrapping at 2^32.
* This uses 16-bit operations internally to work around bugs in interpreters.
*
* @param {number} x First integer
* @param {number} y Second integer
* @returns {number} Sum
*/
function safeAdd(x, y) {
var lsw = (x & 0xffff) + (y & 0xffff)
var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
return (msw << 16) | (lsw & 0xffff)
}
/**
* Bitwise rotate a 32-bit number to the left.
*
* @param {number} num 32-bit number
* @param {number} cnt Rotation count
* @returns {number} Rotated number
*/
function bitRotateLeft(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt))
}
/**
* Basic operation the algorithm uses.
*
* @param {number} q q
* @param {number} a a
* @param {number} b b
* @param {number} x x
* @param {number} s s
* @param {number} t t
* @returns {number} Result
*/
function md5cmn(q, a, b, x, s, t) {
return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b)
}
/**
* Basic operation the algorithm uses.
*
* @param {number} a a
* @param {number} b b
* @param {number} c c
* @param {number} d d
* @param {number} x x
* @param {number} s s
* @param {number} t t
* @returns {number} Result
*/
function md5ff(a, b, c, d, x, s, t) {
return md5cmn((b & c) | (~b & d), a, b, x, s, t)
}
/**
* Basic operation the algorithm uses.
*
* @param {number} a a
* @param {number} b b
* @param {number} c c
* @param {number} d d
* @param {number} x x
* @param {number} s s
* @param {number} t t
* @returns {number} Result
*/
function md5gg(a, b, c, d, x, s, t) {
return md5cmn((b & d) | (c & ~d), a, b, x, s, t)
}
/**
* Basic operation the algorithm uses.
*
* @param {number} a a
* @param {number} b b
* @param {number} c c
* @param {number} d d
* @param {number} x x
* @param {number} s s
* @param {number} t t
* @returns {number} Result
*/
function md5hh(a, b, c, d, x, s, t) {
return md5cmn(b ^ c ^ d, a, b, x, s, t)
}
/**
* Basic operation the algorithm uses.
*
* @param {number} a a
* @param {number} b b
* @param {number} c c
* @param {number} d d
* @param {number} x x
* @param {number} s s
* @param {number} t t
* @returns {number} Result
*/
function md5ii(a, b, c, d, x, s, t) {
return md5cmn(c ^ (b | ~d), a, b, x, s, t)
}
/**
* Calculate the MD5 of an array of little-endian words, and a bit length.
*
* @param {Array} x Array of little-endian words
* @param {number} len Bit length
* @returns {Array<number>} MD5 Array
*/
function binlMD5(x, len) {
/* append padding */
x[len >> 5] |= 0x80 << len % 32
x[(((len + 64) >>> 9) << 4) + 14] = len
var i
var olda
var oldb
var oldc
var oldd
var a = 1732584193
var b = -271733879
var c = -1732584194
var d = 271733878
for (i = 0; i < x.length; i += 16) {
olda = a
oldb = b
oldc = c
oldd = d
a = md5ff(a, b, c, d, x[i], 7, -680876936)
d = md5ff(d, a, b, c, x[i + 1], 12, -389564586)
c = md5ff(c, d, a, b, x[i + 2], 17, 606105819)
b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330)
a = md5ff(a, b, c, d, x[i + 4], 7, -176418897)
d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426)
c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341)
b = md5ff(b, c, d, a, x[i + 7], 22, -45705983)
a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416)
d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417)
c = md5ff(c, d, a, b, x[i + 10], 17, -42063)
b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162)
a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682)
d = md5ff(d, a, b, c, x[i + 13], 12, -40341101)
c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290)
b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329)
a = md5gg(a, b, c, d, x[i + 1], 5, -165796510)
d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632)
c = md5gg(c, d, a, b, x[i + 11], 14, 643717713)
b = md5gg(b, c, d, a, x[i], 20, -373897302)
a = md5gg(a, b, c, d, x[i + 5], 5, -701558691)
d = md5gg(d, a, b, c, x[i + 10], 9, 38016083)
c = md5gg(c, d, a, b, x[i + 15], 14, -660478335)
b = md5gg(b, c, d, a, x[i + 4], 20, -405537848)
a = md5gg(a, b, c, d, x[i + 9], 5, 568446438)
d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690)
c = md5gg(c, d, a, b, x[i + 3], 14, -187363961)
b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501)
a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467)
d = md5gg(d, a, b, c, x[i + 2], 9, -51403784)
c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473)
b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734)
a = md5hh(a, b, c, d, x[i + 5], 4, -378558)
d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463)
c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562)
b = md5hh(b, c, d, a, x[i + 14], 23, -35309556)
a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060)
d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353)
c = md5hh(c, d, a, b, x[i + 7], 16, -155497632)
b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640)
a = md5hh(a, b, c, d, x[i + 13], 4, 681279174)
d = md5hh(d, a, b, c, x[i], 11, -358537222)
c = md5hh(c, d, a, b, x[i + 3], 16, -722521979)
b = md5hh(b, c, d, a, x[i + 6], 23, 76029189)
a = md5hh(a, b, c, d, x[i + 9], 4, -640364487)
d = md5hh(d, a, b, c, x[i + 12], 11, -421815835)
c = md5hh(c, d, a, b, x[i + 15], 16, 530742520)
b = md5hh(b, c, d, a, x[i + 2], 23, -995338651)
a = md5ii(a, b, c, d, x[i], 6, -198630844)
d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415)
c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905)
b = md5ii(b, c, d, a, x[i + 5], 21, -57434055)
a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571)
d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606)
c = md5ii(c, d, a, b, x[i + 10], 15, -1051523)
b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799)
a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359)
d = md5ii(d, a, b, c, x[i + 15], 10, -30611744)
c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380)
b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649)
a = md5ii(a, b, c, d, x[i + 4], 6, -145523070)
d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379)
c = md5ii(c, d, a, b, x[i + 2], 15, 718787259)
b = md5ii(b, c, d, a, x[i + 9], 21, -343485551)
a = safeAdd(a, olda)
b = safeAdd(b, oldb)
c = safeAdd(c, oldc)
d = safeAdd(d, oldd)
}
return [a, b, c, d]
}
function word_to_uint8array(word, uint8arr, pos) {
uint8arr[pos] = (word & 0x000000ff);
uint8arr[pos + 1] = (word & 0x0000ff00) >> 8;
uint8arr[pos + 2] = (word & 0x00ff0000) >> 16;
uint8arr[pos + 3] = (word & 0xff000000) >> 24;
}
function binl_to_uint8array(binl) {
var uint8arr = new Uint8Array(16);
word_to_uint8array(binl[0], uint8arr, 0);
word_to_uint8array(binl[1], uint8arr, 4);
word_to_uint8array(binl[2], uint8arr, 8);
word_to_uint8array(binl[3], uint8arr, 12);
return uint8arr;
}
function uint8array_to_wordarray(uint8arr) {
var wordarray = [];
wordarray[uint8arr.byteLength >> 2] = undefined;
for (var i = 0; i < wordarray.length; i++) {
var a = uint8arr[(i * 4)];
var b = uint8arr[(i * 4) + 1] << 8;
var c = uint8arr[(i * 4) + 2] << 16;
var d = uint8arr[(i * 4) + 3] << 24;
if (a === undefined) { a = 0; }
if (b === undefined) { b = 0; }
if (c === undefined) { c = 0; }
if (d === undefined) { d = 0; }
wordarray[i] = a | b | c | d;
}
return wordarray;
}
function md5(uint8arr) {
return binl_to_uint8array(binlMD5(uint8array_to_wordarray(uint8arr), uint8arr.byteLength * 8));
}